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MTD
Gas Walk-Behind Mower

Model # 12AVB2R3793 Official MTD gas lawn mower

Here are the diagrams and repair parts for Official MTD 12AVB2R3793 gas lawn mower, as well as links to manuals and error code tables, if available.

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  • In the search box below, enter all or part of the part number or the part’s name.

Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

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For DIY troubleshooting advice and repair guides, visit our repair help section.

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Showing 10 of 133 parts  |
Troybilt Lawn Mower 21-in Deck Mulching Blade (replaces 01002810, 742-0741a, 942-04276, 942-0741) 942-0741A
#NI03

Lawn mower diagram

Troybilt lawn mower 21-in deck mulching blade (replaces 01002810, 742-0741a, 942-04276, 942-0741)

Part #942-0741A

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Air Filter BS-593260
#NI01

Lawn mower diagram

Air filter

Part #BS-593260

Replaced by #593260

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Manufacturer substitution
This part replaces BS-593260. Substitute parts can look different from the original.
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Lawn Mower Wheel, 8 X 2-in 634-05040
#NI16

Lawn mower diagram

Lawn mower wheel, 8 x 2-in

Part #634-05040

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Lawn Mower Zone Control Cable (replaces 946-04661) 946-04661A
#NI07

Lawn mower diagram

Lawn mower zone control cable (replaces 946-04661)

Part #946-04661A

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Lawn Mower Rear Skirt 731-07203
#NI15

Lawn mower diagram

Lawn mower rear skirt

Part #731-07203

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Lawn Mower Mulching Plug Assembly (replaces 987-02516) 987-02516A
#NI13

Lawn mower diagram

Lawn mower mulching plug assembly (replaces 987-02516)

Part #987-02516A

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Lawn Mower Grass Bag Frame (replaces 647-04271, 747-05226) 647-04271-0637
#NI11

Lawn mower diagram

Lawn mower grass bag frame (replaces 647-04271, 747-05226)

Part #647-04271-0637

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Lawn Mower Deflector Shield 731-07131
#NI09

Lawn mower diagram

Lawn mower deflector shield

Part #731-07131

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Yard Machines Lawn & Garden Equipment Hex Bolt, 3/8-24 X 1-1/2-in (replaces 910-1044) 710-1044
#NI06

Lawn mower diagram

Yard machines lawn & garden equipment hex bolt, 3/8-24 x 1-1/2-in (replaces 910-1044)

Part #710-1044

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Fuel Cap BS-594061
#NI10

Lawn mower diagram

Fuel cap

Part #BS-594061

Replaced by #84004416

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Manufacturer substitution
This part replaces BS-594061. Substitute parts can look different from the original.
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Symptoms for gas walk-behind mowers

Choose a symptom to see related walk-behind mower repairs.

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Why won't my lawn mower move?

Main causes: drive control cable failure, worn or broken drive belt, bad transmission, broken drive wheel…

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Why does my lawn mower run rough?

Main causes: engine needs tune up, dirty or clogged carburetor, damaged flywheel key…

Read more

Why does my lawn mower stall?

Main causes: dirty carburetor, bad spark plug, clogged air filter, engine choke problems, clogged gas cap vent…

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Why does my lawn mower vibrate a lot?

Main causes: damaged cutting blade, loose cutting blade, damaged flywheel key, engine needs tune up…

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Why won't my lawn mower start?

Main causes: stale gas, engine needs tune up, bad spark plug, dead battery, bad recoil starter, faulty safety switch, ba…

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Why does my lawn mower cut unevenly?

Main causes: uneven wheel height settings, damaged wheel, dull or damaged cutting blade…

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Repair guides for gas walk-behind mowers

These step-by-step repair guides will help you safely fix what’s broken on your walk-behind lawn mower.

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How to replace a lawn mower spark plug

How to replace a lawn mower spark plug

Take a few minutes to replace the spark plug during your lawn mower's annual tune-up or if the spark plug is burnt or cr…

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Repair difficulty
Time required
 15 minutes or less
How to replace a lawn mower drive cable

How to replace a lawn mower drive cable

The drive cable engages the transmission to spin the drive wheels and move the mower across the grass. Replace the drive…

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Repair difficulty
Time required
 60 minutes or less
How to replace a lawn mower starter rope

How to replace a lawn mower starter rope

These step-by-step instructions show how to replace a broken starter pull rope on a walk-behind lawn mower.…

Read more
Repair difficulty
Time required
 30 minutes or less

Effective articles & videos to help repair your walk-behind mowers

Use the advice and tips in these articles and videos to get the most out of your walk-behind lawn mower.

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Tapping into a new feature in the Search Bar on Sears PartsDirect

Tapping into a new feature in the Search Bar on Sears PartsDirect

Learn about a new feature added to the Search Bar on Sears PartsDirect…

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Introducing new technical repair content that we’re developing for the Sears Technical Institute

Introducing new technical repair content that we’re developing for the Sears Technical Institute

Learn about Sears Technical Institute and the advanced technical content being developed for aspiring appliance techs.…

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Top questions about Sears and Sears PartsDirect

Top questions about Sears and Sears PartsDirect

Get answers to frequently asked questions about Sears and Sears PartsDirect.…

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